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Performance Specifications |
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Parameter |
Specifications |
| Material |
Grade A fine annealed crown and flint glass, or as
specified |
| Design Wavelength |
Customer specification |
| Diameter Tolerance |
± 0.25mm |
| Paraxical Focal Length |
± 5% at 546.1 nm, or as specified |
| Centration |
± 3 arc minutes |
| Center Thickness |
± 0.25mm |
| Clear Aperture |
90% of the diameter |
| Scratch and dig |
60-40, 40-20, up to 10-5 upon request |
| Circumference |
Fine ground, slight protective bevel for both edges |
| AR Coating |
MgF2, visible wavelength, or as specified |
| Customeized Specs |
Available upon request as per drawing |
Spectral Chart |
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